birt出现的错误，前两天还是好的，今天突然坏了！怎么回事
数据库是好的！数据源用的是index索引！
前两天一直是好的，今天突然坏了,怎么回事??
希望大家给以解决！
高分相许！
2007-4-25 9:02:25 org.eclipse.birt.chart.internal.datafeed.ResultSetWrapper initializeMeta
警告: Unable to determine data types from resultset
2007-4-25 9:02:25 org.eclipse.birt.chart.internal.datafeed.ResultSetWrapper initializeMeta
警告: Unable to determine data types from resultset
2007-4-25 9:02:25 org.eclipse.birt.chart.internal.datafeed.ResultSetWrapper initializeMeta
警告: Unable to determine data types from resultset
2007-4-25 9:02:25 org.eclipse.birt.chart.internal.datafeed.ResultSetWrapper initializeMeta
警告: Unable to determine data types from resultset
2007-4-25 9:02:25 org.eclipse.birt.chart.internal.datafeed.ResultSetWrapper initializeMeta
警告: Unable to determine data types from resultset
2007-4-25 9:02:26 org.eclipse.birt.chart.exception.ChartException logThis
严重: Exception
org.eclipse.birt.chart.exception.ChartException: Empty dataset found
at org.eclipse.birt.chart.datafeed.DataSetProcessorImpl.populate(DataSetProcessorImpl.java:248)
at org.eclipse.birt.chart.internal.datafeed.DataProcessor.fillSeriesDataSet(DataProcessor.java:1516)
at org.eclipse.birt.chart.internal.datafeed.DataProcessor.fillSeriesDataSet(DataProcessor.java:1485)
at org.eclipse.birt.chart.internal.datafeed.DataProcessor.generateRuntimeSeries(DataProcessor.java:976)
at org.eclipse.birt.chart.internal.datafeed.DataProcessor.generateRuntimeSeries(DataProcessor.java:721)
at org.eclipse.birt.chart.factory.Generator.bindData(Generator.java:559)
at org.eclipse.birt.chart.reportitem.ChartReportItemPresentationImpl.onRowSets(ChartReportItemPresentationImpl.java:399)
at org.eclipse.birt.report.engine.presentation.LocalizedContentVisitor.processExtendedContent(LocalizedContentVisitor.java:651)
at org.eclipse.birt.report.engine.presentation.LocalizedContentVisitor.visitForeign(LocalizedContentVisitor.java:359)
at org.eclipse.birt.report.engine.content.impl.ForeignContent.accept(ForeignContent.java:58)
at org.eclipse.birt.report.engine.presentation.LocalizedContentVisitor.localize(LocalizedContentVisitor.java:111)
at org.eclipse.birt.report.engine.internal.executor.l18n.LocalizedReportItemExecutor.execute(LocalizedReportItemExecutor.java:38)
at org.eclipse.birt.report.engine.layout.html.HTMLPageLM.layoutChildren(HTMLPageLM.java:123)
at org.eclipse.birt.report.engine.layout.html.HTMLPageLM.layout(HTMLPageLM.java:81)
at org.eclipse.birt.report.engine.layout.html.HTMLReportLayoutEngine.layout(HTMLReportLayoutEngine.java:80)
at org.eclipse.birt.report.engine.api.impl.RunAndRenderTask.run(RunAndRenderTask.java:194)
at org.eclipse.birt.report.service.ReportEngineService.runAndRenderReport(Unknown Source)
at org.eclipse.birt.report.service.ReportEngineService.runAndRenderReport(Unknown Source)
at org.eclipse.birt.report.service.BirtViewerReportService.runAndRenderReport(Unknown Source)
at org.eclipse.birt.report.service.actionhandler.BirtRunAndRenderActionHandler.__execute(Unknown Source)
at org.eclipse.birt.report.service.actionhandler.AbstractBaseActionHandler.execute(Unknown Source)
at org.eclipse.birt.report.presentation.aggregation.layout.EngineFragment.doService(Unknown Source)
at org.eclipse.birt.report.presentation.aggregation.AbstractBaseFragment.service(Unknown Source)

at org.eclipse.birt.report.servlet.BirtEngineServlet.__doGet(Unknown Source)
at org.eclipse.birt.report.servlet.BaseReportEngineServlet.doGet(Unknown Source)
at org.eclipse.birt.report.servlet.BaseReportEngineServlet.doPost(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:154)
at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:92)
at com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:103)
at com.caucho.server.webapp.DispatchFilterChain.doFilter(DispatchFilterChain.java:97)
at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:226)
at com.caucho.server.webapp.RequestDispatcherImpl.include(RequestDispatcherImpl.java:488)
at com.caucho.server.webapp.RequestDispatcherImpl.include(RequestDispatcherImpl.java:353)
at com.caucho.jsp.PageContextImpl.include(PageContextImpl.java:957)
at com.caucho.jsp.PageContextImpl.include(PageContextImpl.java:910)
at _jsp._view._medicalmaterial._country__jsp._jspService(_country__jsp.java:72)
at com.caucho.jsp.JavaPage.service(JavaPage.java:61)
at com.caucho.jsp.Page.pageservice(Page.java:577)
at com.caucho.server.dispatch.PageFilterChain.doFilter(PageFilterChain.java:190)
at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:167)
at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:226)
at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:263)
at com.caucho.server.port.TcpConnection.run(TcpConnection.java:477)
at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:591)
at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:513)
at java.lang.Thread.run(Thread.java:619)
2007-4-25 9:02:26 org.eclipse.birt.chart.exception.ChartException logThis
严重: Exception
org.eclipse.birt.chart.exception.ChartException: Empty dataset found

[解决办法]
org.eclipse.birt.chart.exception.ChartException: Empty dataset found
数据集没有找到,建议,把数据库重新连接一下,另外,还要把插件的.jar文件重新导入一遍,看有没有丢掉什么东西的.